Portland stone

High school (ages 12+)
Environment & Earth

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/portland-stone

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the geological classification?Portland Stone Formation, a member of the Purbeck Group
2. What is the stratigraphic age?Tithonian stage of the Late Jurassic epoch
3. Where does Portland stone come from?It comes from the Isle of Portland in England, where it was formed about 152 to 145 million years ago in a warm, shallow sea.
4. Why do people use Portland stone for buildings?Because it is strong, can be cut into smooth shapes, and stays beautiful even when it rains or gets dirty.

Oolitic Limestone: Limestone composed of small, spherical grains of calcium carbonate, formed in shallow marine environments.
Tithonian Age: The final age of the Late Jurassic epoch, preceding the Cretaceous period.
Stratigraphy: The study of rock layers (strata) and layering (stratification) in rock formations.
Lithology: The physical characteristics of a rock, such as its color, texture, and composition.